Electric heating wax-melting prevention system for high-wax-content oil well and gas well and control method
A control method and oil well technology, applied in the direction of electric heating device, ohmic resistance heating, borehole/well parts, etc., can solve the problems of low heat resistance temperature of electric wax removal, inability to meet single-point suspension, poor mechanical strength, etc., and achieve heating Large depth, reduced cost of wax removal, and high corrosion resistance
Pending Publication Date: 2020-01-17
久盛电气股份有限公司
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Problems solved by technology
[0004] The existing electric wax removal has low heat-resistant temperature and poor mechanical strength, which cannot meet the single-point suspension, and the control system method is simple on-off type, which has low efficiency and high energy consumption
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[0025] Such as Figure 1-3 As shown, the mineral insulated electric heating anti-chemical wax system for oil wells and gas wells with high wax content includes 10kv power grid line 1, transformer components, Christmas tree 2, casing 3 and production tubing 4, the 10kv power grid line 1 and transformer The casing 3 is vertically fixed on the lower end of the oil production tree 2, and the oil production pipe 4 is installed inside the casing 3, and is inserted from the upper end of the oil production tree 2 and extends to the lower end of the oil production pipe 4 and is located on the oil production pipe 4. The inner cylindrical heating element 5 has a cold end section 501 and a heating section 502. The cold end section 501 extends outward from the upper end of the Christmas tree 2 and is connected with an explosion-proof junction box 9. The explosion-proof junction box 9 The thyristor power adjustment control cabinet 10 is connected by wires. The heating section 502 extends fr...
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The invention discloses an electric heating wax-melting prevention system for a high-wax-content oil well and a gas well and a control method. The electric heating wax-melting prevention system comprises a 10kv power grid circuit, a voltage transformation assembly, a production tree, a casing and an oil extraction pipe. The control method comprises the steps that (1) three copper wire wires, a magnesium oxide layer wrapping the three copper wire cores and a stainless steel sheath layer are integrated, and the tail ends of the three copper wire cores are connected through star connection welding points to form a heating element which is resistant to high temperature (more than 500 DEG C); and (2) the heating element can be hung in the oil extraction pipe in a single-point mode through sealing and hanging assemblies such as a cable hanging clamp, a sealing box and a double-gate blowout preventer, and a silicon controlled stepless power regulation control method is adopted. Compared witha conventional wax removal process, the electric heating wax-melting prevention system has the characteristics of being high in heating efficiency, large in heating depth, resistant to high temperature and corrosion, accurate and flexible in control, free of production halt during working, capable of saving energy and reducing consumption and the like; and by applying the system and the control method, the wax removal cost of the high-wax-content oil well and the gas well is expected to be reduced by 30% or above, production halt is avoided while wax melting prevention is achieved, and the yield of a single well is obviously increased.
Description
Technical field: [0001] The invention relates to the field of an electric heating anti-chemical wax system and a control method, in particular to an electric heating anti-chemical wax system and a control method for oil wells and gas wells with high wax content. Background technique: [0002] Oil and gas wells with high wax content often have high wax content, high pressure, high production difficulty and high maintenance cost. As a result, the output of a single well is limited, and the benefits obtained are not optimistic. When the oil and gas in the tubing are lifted from the bottom of the well to the wellhead, due to the large amount of heat dissipation from the wellbore at the wellhead to the surrounding rock formations, the temperature of the oil drops significantly, and the wax dissolved in the crude oil precipitates out, forming paraffin and adhering to the inner wall of the tubing, reducing the oil loss. diameter, or even block the oil pipe, leading to major liabil...
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IPC IPC(8): E21B37/00E21B33/03E21B33/06E21B19/06E21B47/07H05B3/00H05B3/02
CPCE21B37/00E21B33/03E21B33/06E21B19/06H05B3/02H05B3/0019
Inventor 张建华费波
Owner 久盛电气股份有限公司